Merge tag 'media/v3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:
 - Two new dvb frontend drivers: mn88472 and mn88473
 - A new driver for some PCIe DVBSky cards
 - A new remote controller driver: meson-ir
 - One LIRC staging driver got rewritten and promoted to mainstream:
   igorplugusb
 - A new tuner driver (m88rs6000t)
 - The old omap2 media driver got removed from staging.  This driver
   uses an old DMA API and it is likely broken on recent kernels.
   Nobody cared enough to fix it
 - Media bus format moved to a separate header, as DRM will also use the
   definitions there
 - mem2mem_testdev were renamed to vim2m, in order to use the same
   naming convention taken by the other virtual test driver (vivid)
 - Added a new driver for coda SoC (coda-jpeg)
 - The cx88 driver got converted to use videobuf2 core
 - Make DMABUF export buffer to work with DMA Scatter/Gather and Vmalloc
   cores
 - Lots of other fixes, improvements and cleanups on the drivers.

* tag 'media/v3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (384 commits)
  [media] mn88473: One function call less in mn88473_init() after error
  [media] mn88473: Remove uneeded check before release_firmware()
  [media] lirc_zilog: Deletion of unnecessary checks before vfree()
  [media] MAINTAINERS: Add myself as img-ir maintainer
  [media] img-ir: Don't set driver's module owner
  [media] img-ir: Depend on METAG or MIPS or COMPILE_TEST
  [media] img-ir/hw: Drop [un]register_decoder declarations
  [media] img-ir/hw: Fix potential deadlock stopping timer
  [media] img-ir/hw: Always read data to clear buffer
  [media] redrat3: ensure dma is setup properly
  [media] ddbridge: remove unneeded check before dvb_unregister_device()
  [media] si2157: One function call less in si2157_init() after error
  [media] tuners: remove uneeded checks before release_firmware()
  [media] arm: omap2: rx51-peripherals: fix build warning
  [media] stv090x: add an extra protetion against buffer overflow
  [media] stv090x: Remove an unreachable code
  [media] stv090x: Some whitespace cleanups
  [media] em28xx: checkpatch cleanup: whitespaces/new lines cleanups
  [media] si2168: add support for firmware files in new format
  [media] si2168: debug printout for firmware version
  ...

3 files changed, 14 insertions, 11 deletions

diff --git a/drivers/media/pci/tw68/tw68-core.c b/drivers/media/pci/tw68/tw68-core.c
index 63f0b64057cb..c135165a8b26 100644
--- a/drivers/media/pci/tw68/tw68-core.c
+++ b/drivers/media/pci/tw68/tw68-core.c
@@ -304,13 +304,19 @@ static int tw68_initdev(struct pci_dev *pci_dev,
 	/* Then do any initialisation wanted before interrupts are on */
 	tw68_hw_init1(dev);
 
+	dev->alloc_ctx = vb2_dma_sg_init_ctx(&pci_dev->dev);
+	if (IS_ERR(dev->alloc_ctx)) {
+		err = PTR_ERR(dev->alloc_ctx);
+		goto fail3;
+	}
+
 	/* get irq */
 	err = devm_request_irq(&pci_dev->dev, pci_dev->irq, tw68_irq,
 			  IRQF_SHARED, dev->name, dev);
 	if (err < 0) {
 		pr_err("%s: can't get IRQ %d\n",
 		       dev->name, pci_dev->irq);
-		goto fail3;
+		goto fail4;
 	}
 
 	/*
@@ -324,7 +330,7 @@ static int tw68_initdev(struct pci_dev *pci_dev,
 	if (err < 0) {
 		pr_err("%s: can't register video device\n",
 		       dev->name);
-		goto fail4;
+		goto fail5;
 	}
 	tw_setl(TW68_INTMASK, dev->pci_irqmask);
 
@@ -333,8 +339,10 @@ static int tw68_initdev(struct pci_dev *pci_dev,
 
 	return 0;
 
-fail4:
+fail5:
 	video_unregister_device(&dev->vdev);
+fail4:
+	vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
 fail3:
 	iounmap(dev->lmmio);
 fail2:
@@ -358,6 +366,7 @@ static void tw68_finidev(struct pci_dev *pci_dev)
 	/* unregister */
 	video_unregister_device(&dev->vdev);
 	v4l2_ctrl_handler_free(&dev->hdl);
+	vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
 
 	/* release resources */
 	iounmap(dev->lmmio);
diff --git a/drivers/media/pci/tw68/tw68-video.c b/drivers/media/pci/tw68/tw68-video.c
index 5c94ac7c88d9..8355e55b4e8e 100644
--- a/drivers/media/pci/tw68/tw68-video.c
+++ b/drivers/media/pci/tw68/tw68-video.c
@@ -384,6 +384,7 @@ static int tw68_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
 	unsigned tot_bufs = q->num_buffers + *num_buffers;
 
 	sizes[0] = (dev->fmt->depth * dev->width * dev->height) >> 3;
+	alloc_ctxs[0] = dev->alloc_ctx;
 	/*
 	 * We allow create_bufs, but only if the sizeimage is the same as the
 	 * current sizeimage. The tw68_buffer_count calculation becomes quite
@@ -461,17 +462,12 @@ static int tw68_buf_prepare(struct vb2_buffer *vb)
 	struct tw68_buf *buf = container_of(vb, struct tw68_buf, vb);
 	struct sg_table *dma = vb2_dma_sg_plane_desc(vb, 0);
 	unsigned size, bpl;
-	int rc;
 
 	size = (dev->width * dev->height * dev->fmt->depth) >> 3;
 	if (vb2_plane_size(vb, 0) < size)
 		return -EINVAL;
 	vb2_set_plane_payload(vb, 0, size);
 
-	rc = dma_map_sg(&dev->pci->dev, dma->sgl, dma->nents, DMA_FROM_DEVICE);
-	if (!rc)
-		return -EIO;
-
 	bpl = (dev->width * dev->fmt->depth) >> 3;
 	switch (dev->field) {
 	case V4L2_FIELD_TOP:
@@ -505,11 +501,8 @@ static void tw68_buf_finish(struct vb2_buffer *vb)
 {
 	struct vb2_queue *vq = vb->vb2_queue;
 	struct tw68_dev *dev = vb2_get_drv_priv(vq);
-	struct sg_table *dma = vb2_dma_sg_plane_desc(vb, 0);
 	struct tw68_buf *buf = container_of(vb, struct tw68_buf, vb);
 
-	dma_unmap_sg(&dev->pci->dev, dma->sgl, dma->nents, DMA_FROM_DEVICE);
-
 	pci_free_consistent(dev->pci, buf->size, buf->cpu, buf->dma);
 }
 
diff --git a/drivers/media/pci/tw68/tw68.h b/drivers/media/pci/tw68/tw68.h
index 2c8abe26b13b..7a7501bd165f 100644
--- a/drivers/media/pci/tw68/tw68.h
+++ b/drivers/media/pci/tw68/tw68.h
@@ -181,6 +181,7 @@ struct tw68_dev {
 	unsigned		field;
 	struct vb2_queue	vidq;
 	struct list_head	active;
+	void			*alloc_ctx;
 
 	/* various v4l controls */
 	const struct tw68_tvnorm *tvnorm;	/* video */